build: changelog updated

Author: desht

CHANGELOG.md

@@ -4,6 +4,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2101.1.0]
+
+### Changed
+* Ported to MC 1.21.1
+  * Will not run on MC 1.21
+
+### Added
+* Sidebar buttons for this and other FTB mods can now be enabled/disabled/rearranged (new functionality in FTB Library 2101.1.0)
+
+## [2100.1.0]
+
+### Changed
+* Ported to MC 1.21
+
 ## [2006.1.0]
 
 ### Changed